The Burj al-Arab is a luxury hotel in Dubai, United Arab Emirates. At 321 metres (1,053 feet), it is the tallest building used exclusively as a hotel. The Burj al-Arab does not have ordinary rooms; rather it is divided into 202 duplex suites. We your a small suite. Suites occupy an area of 169 square metres (1,819 square feet), the largest one covers 780 square metres (8,396 square feet). It is one of the most expensive hotels in the world to stay in. The cost of staying in a suite begins at $1,000 per night and increases to over $15,000 per night.

Hoover Dam, once known as Boulder Dam, is a concrete arch-gravity dam in the Black Canyon of the Colorado River, on the border between the U.S. states of Arizona and Nevada. When completed in 1936, it was both the world's largest electric-power generating station and the world's largest concrete structure. It was surpassed in both these respects by the Grand Coulee Dam in 1945. It is currently the world's 35th-largest hydroelectric generating station.

The Channel Tunnel also known as the Chunnel, is a 50.5-kilometre (31.4 mi) undersea rail tunnel linking Folkestone, Kent in the UK with Coquelles, near Calais in northern France beneath the English Channel at the Strait of Dover. At its lowest point it is 75 m (246 ft) deep. The Channel Tunnel has the longest undersea portion of any tunnel in the world although the Seikan Tunnel in Japan is both longer overall, at 53.85 kilometres (33.6 mi) and deeper, at 240 metres (790 ft).

Concrete is a construction material composed of cement (commonly Portland cement) as well as other cementitious materials such as fly ash and slag cement, aggregate (generally a coarse aggregate such as gravel, limestone, or granite, plus a fine aggregate such as sand), water, and chemical admixtures. The word concrete comes from the Latin word "concretus" (meaning compact or condensed), the past participle of "concresco", from "com-" (together) and "cresco" (to grow).

The Palm Islands are artificial islands in Dubai, United Arab Emirates on which major commercial and residential infrastructure will be constructed. They are being constructed by Nakheel Properties, a property developer in the United Arab Emirates, who hired Belgian and Dutch dredging and marine contractor Jan De Nul and Van Oord, some of the world's specialists in land reclamation. The islands are the Palm Jumeirah, the Palm Jebel Ali and the Palm Deira.